1  /* Rename a file using relative source and destination names.  Hurd version.
       2     Copyright (C) 1991-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <stdio.h>
      20  #include <hurd.h>
      21  #include <hurd/fd.h>
      22  
      23  /* Rename the file OLD relative to OLDFD to NEW relative to NEWFD.  */
      24  int
      25  __renameat2 (int oldfd, const char *old, int newfd, const char *new,
      26               unsigned int flags)
      27  {
      28    error_t err;
      29    file_t olddir, newdir;
      30    const char *oldname, *newname;
      31    int excl = 0;
      32  
      33    if ((flags & (RENAME_EXCHANGE | RENAME_NOREPLACE)) == (RENAME_EXCHANGE | RENAME_NOREPLACE))
      34      return __hurd_fail (EINVAL);
      35    if (flags & (RENAME_EXCHANGE | RENAME_WHITEOUT))
      36      return __hurd_fail (ENOSYS);
      37    if (flags & RENAME_NOREPLACE)
      38      excl = 1;
      39  
      40    olddir = __directory_name_split_at (oldfd, old, (char **) &oldname);
      41    if (olddir == MACH_PORT_NULL)
      42      return -1;
      43    newdir = __directory_name_split_at (newfd, new, (char **) &newname);
      44    if (newdir == MACH_PORT_NULL)
      45      {
      46         __mach_port_deallocate (__mach_task_self (), olddir);
      47        return -1;
      48      }
      49  
      50    err = __dir_rename (olddir, oldname, newdir, newname, excl);
      51    __mach_port_deallocate (__mach_task_self (), olddir);
      52    __mach_port_deallocate (__mach_task_self (), newdir);
      53    if (err)
      54      return __hurd_fail (err);
      55    return 0;
      56  }
      57  libc_hidden_def (__renameat2)
      58  weak_alias (__renameat2, renameat2)